National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

32°F

0°C

Humidity 66%
Wind Speed NW 5 mph
Barometer 30.41 in (1031.7 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 1 Dec 7:56 am EST
Extended Forecast for

Olney MD

  • Today

    Today: Mostly sunny, with a high near 41. Northwest wind 5 to 10 mph becoming light north in the afternoon.

    High: 41 °F

    Mostly Sunny

  • Tonight

    Tonight: Snow likely, mainly after 5am. Increasing clouds, with a low around 28. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Partly Cloudy
    then Snow
    Likely

  • Tuesday

    Tuesday: Rain, possibly mixed with snow, becoming all rain after 10am. High near 38. Light and variable wind becoming northwest 5 to 9 mph in the morning. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 38 °F

    Rain/Snow
    then Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 38. Northwest wind 3 to 6 mph.

    High: 38 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Friday

    Friday: A chance of snow after 1pm. Mostly cloudy, with a high near 32. Chance of precipitation is 30%.

    High: 32 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Today
Mostly sunny, with a high near 41. Northwest wind 5 to 10 mph becoming light north in the afternoon.
Tonight
Snow likely, mainly after 5am. Increasing clouds, with a low around 28. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Tuesday
Rain, possibly mixed with snow, becoming all rain after 10am. High near 38. Light and variable wind becoming northwest 5 to 9 mph in the morning. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Tuesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 38. Northwest wind 3 to 6 mph.
Wednesday Night
Mostly clear, with a low around 24.
Thursday
Partly sunny, with a high near 40.
Thursday Night
Partly cloudy, with a low around 18.
Friday
A chance of snow after 1pm. Mostly cloudy, with a high near 32. Chance of precipitation is 30%.
Friday Night
A chance of snow before 1am, then freezing rain likely. Cloudy, with a low around 27. Chance of precipitation is 60%.
Saturday
A chance of rain. Mostly cloudy, with a high near 40. Chance of precipitation is 40%.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 41.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Olney MD
 39.14°N 77.07°W (Elev. 499 ft)
Last Update:
7:51 am EST Dec 1, 2025
Forecast Valid:
8am EST Dec 1, 2025-6pm EST Dec 7, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation